þjónuðu
þjónuðu is the past tense plural form of the Icelandic verb "þjóna". "þjóna" means to serve, to minister, or to be in service. Therefore, "þjónuðu" translates to "served" when referring to multiple subjects or a group.
In Icelandic grammar, verbs change their endings based on tense, mood, number, and person. The suffix "-uðu"
The verb "þjóna" and its conjugations, including "þjónuðu", are commonly used in various contexts, from religious